mersenneforum.org Found a factor? Post it here.
 Register FAQ Search Today's Posts Mark Forums Read

2023-03-20, 18:51   #2289
James Heinrich

"James Heinrich"
May 2004
ex-Northern Ontario

4,157 Posts

Quote:
 Originally Posted by LordJulius Why skip TF 2^79 to 2^80 ?
He probably did it, but since it now shows up as a TF gap I re-did it:
no factor for M333333493 from 2^79 to 2^80 [mfaktc 0.21 barrett87_mul32_gs]
tf(): total time spent: 44m 8.503s

Quote:
 Originally Posted by kriesel DC avoided, and with a ~106. bit factor found
Or, formatted:
Quote:
 M106971629 has a 105.971-bit (32-digit) factor: 79534574109359138908214691895351 (P-1,B1=582000,B2=190186920) k = 3^2 * 5^2 * 7 * 233 * 953 * 1901 * 4643 * 120433463

Last fiddled with by James Heinrich on 2023-03-20 at 18:52

 2023-03-21, 03:41 #2290 Jwb52z     Sep 2002 22×3×71 Posts P-1 found a factor in stage #2, B1=501000, B2=16987500. UID: Jwb52z/Clay, M117383251 has a factor: 4607805263510756479738961 (P-1, B1=501000, B2=16987500) 81.930 bits.
 2023-03-21, 16:07 #2291 Miszka     May 2013 Poland 107 Posts I found 4 factors: sixth (254707775084069984279 - 67.8 bits); seventh (1026695470153012861417 - 69.8 bits); eighth (8651909121526379308519 - 72.9 bits) and ninth (29616184428737548369319 - 74.6 bits) for M662869847 Last fiddled with by Miszka on 2023-03-21 at 16:10
2023-03-21, 16:21   #2292
James Heinrich

"James Heinrich"
May 2004
ex-Northern Ontario

4,157 Posts

Quote:
 Originally Posted by Miszka I found 4 factors
Nice! The smallest one would've been found in a few weeks by TJAOI, but you got there first.

Outside GIMPS range, but I recently found 3 factors for M4267897171 within 0.85 bits of each other:
73.915-bit M4267897171 has a factor: 17807676876562259133311
74.723-bit M4267897171 has a factor: 31174335411508659346271
74.765-bit M4267897171 has a factor: 32092274269846547707271

 Similar Threads Thread Thread Starter Forum Replies Last Post Andrew Usher Lounge 18 2023-01-05 13:23 stanneraustin Homework Help 0 2022-10-04 15:17 Branger Factoring 15 2019-09-05 15:03 Axel Fox Lone Mersenne Hunters 19 2003-10-19 07:40 remaker Software 4 2002-10-17 08:18

All times are UTC. The time now is 00:05.

Wed Mar 22 00:05:19 UTC 2023 up 215 days, 21:33, 0 users, load averages: 0.44, 0.63, 0.73